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# Howto RabbitMQ
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<https://www.rabbitmq.com/>
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## Installation
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~~~
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# apt install rabbitmq-server
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~~~
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~~~
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# rabbitmqctl status
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{running_applications,[{rabbit,"RabbitMQ","3.3.5"},
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{mnesia,"MNESIA CXC 138 12","4.12.3"},
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{os_mon,"CPO CXC 138 46","2.3"},
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{xmerl,"XML parser","1.3.7"},
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{sasl,"SASL CXC 138 11","2.4.1"},
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{stdlib,"ERTS CXC 138 10","2.2"},
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{kernel,"ERTS CXC 138 10","3.0.3"}]},
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{os,{unix,linux}},
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{erlang_version,"Erlang/OTP 17 [erts-6.2] [source] [64-bit] [smp:4:4] [async-threads:30] [kernel-poll:true]\n"},
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~~~
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## Configuration
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La configuration par défaut de RabbitMQ est souvent utilisable en l'état, sans besoin de modification.
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Si l'on doit modifier la configuration, voici les fichiers :
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* `/etc/rabbitmq/rabbitmq-env.conf` : variables d'environnement pour RabbitMQ
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* `/etc/rabbitmq/rabbitmq.config` : options pour RabbitMQ
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* `/etc/default/rabbitmq-server` : configuration système (ulimit)
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### Variables d'environnement pour RabbitMQ
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Il faut donc créer le fichier :
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~~~
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# touch /etc/rabbitmq/rabbitmq-env.conf
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# chmod 600 /etc/rabbitmq/rabbitmq-env.conf
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# chown rabbitmq:rabbitmq /etc/rabbitmq/rabbitmq-env.conf
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~~~
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Différentes variables *RABBITMQ_\** sont utilisables :
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~~~
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RABBITMQ_NODE_PORT=672
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RABBITMQ_SERVER_ERL_ARGS="+K true +A30 +P 1048576 -kernel inet_default_connect_options [{nodelay,true}]"
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~~~
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### Options pour rabbitmq.config
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Il faut donc créer le fichier :
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~~~
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# touch /etc/rabbitmq/rabbitmq.config
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# chmod 600 /etc/rabbitmq/rabbitmq.config
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# chown rabbitmq:rabbitmq /etc/rabbitmq/rabbitmq.config
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~~~
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Différentes options sont utilisables (voir `/usr/share/doc/rabbitmq-server/rabbitmq.config.example.gz` pour un exemple).
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Si l'on veut que RabbitMQ n'écoute que sur l'interface *localhost* :
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~~~
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[
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{rabbit, [
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{tcp_listeners, [{"127.0.0.1", 5672},
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{"::1", 5672}]}
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]}
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].
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~~~
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### Configuration système
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`/etc/default/rabbitmq-server` :
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~~~
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ulimit -n 2048
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~~~
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## Management RabbitMQ
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### rabbitmqctl
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~~~
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# rabbitmqctl status
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# rabbitmqctl list_connections
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# rabbitmqctl list_queues
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~~~
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### Activation de l'interface web de management
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Pour activer l'interface web de management :
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~~~
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# rabbitmq-plugins enable rabbitmq_management
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# chown rabbitmq:rabbitmq /etc/rabbitmq/enabled_plugins
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# systemctl restart rabbitmq-server
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# rabbitmqctl add_user admin PASSWORD
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# rabbitmqctl set_user_tags admin administrator
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~~~
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On a ainsi accès à l'interface web via <http://127.0.0.1:15672/>
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On peut aussi mettre en place un proxy via Nginx :
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~~~
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location /rabbitmq/ {
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proxy_pass http://127.0.0.1:15672/;
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include proxy_params;
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}
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~~~
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### Activation CLI (TODO: à vérifier)
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<https://www.rabbitmq.com/management-cli.html>
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On peut installer un binaire permettant d'avoir un mode CLI pour RabbitMQ :
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{{{
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$ curl localhost:15672/cli/rabbitmqadmin > /usr/local/bin/rabbitmqadmin
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$ chmod 755 /usr/local/bin/rabbitmqadmin
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$ rabbitmqadmin --bash-completion > /etc/bash_completion.d/rabbitmqadmin
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}}}
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/root/.rabbitmqadmin.conf
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{{{
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[default]
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username = admin
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password = PASSWORD
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}}}
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## Sauvegarde
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À l'aide du CLI :
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~~~
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# rabbitmqadmin export rabbitmq.config
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~~~
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## Munin
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On utilise *rabbitmq_connections* :
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~~~
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$ wget https://raw.githubusercontent.com/ask/rabbitmq-munin/master/rabbitmq_connections
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$ chmod +x rabbitmq_connections
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$ ./rabbitmq_connections
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~~~
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Attention, *rabbitmq_connections* utilise la commande `rabbitmqctl` vous devez donc adapter le script ou configurer `/etc/munin/plugin-conf.d/munin-node` ainsi :
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~~~
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[rabbitmq_connections]
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user rabbitmq
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EOT
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~~~
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## Nagios
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On utilise *check_rabbitmq* (merci à <https://github.com/CaptPhunkosis>) :
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~~~
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# apt install python-requests
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$ wget https://raw.githubusercontent.com/CaptPhunkosis/check_rabbitmq/master/check_rabbitmq
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$ chmod +x check_rabbitmq
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$ ./check_rabbitmq -a connection_count -C 100 -W 80
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~~~
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Attention, *check_rabbitmq* utilise la commande `sudo rabbitmqctl` vous devez donc adapter le script ou configurer *sudo*.
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~~~
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nagios ALL = (rabbitmq) NOPASSWD: /usr/sbin/rabbitmqctl list_connections
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nagios ALL = (rabbitmq) NOPASSWD: /usr/sbin/rabbitmqctl list_queues
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nagios ALL = (rabbitmq) NOPASSWD: /usr/sbin/rabbitmqctl list_status
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~~~
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